Products Windows Horizontal Sliders XTherm Series SX45 SpecificationsCAD Details 4 1/2" High Performance Thermal, Horizontal Sliding Architectural Grade Window Series 3500 (T) SpecificationsCAD Details 3 1/4" Heavy Commercial Horizontal Sliding Window - NFRC CMA Approved Series 6551 (TS) Impact - Blast / DoDSeries 6621 Fixed (T) Impact - Blast / DoD SpecificationsCAD Details 3 7/8" Impact Horizontal Sliding / Fixed Windows